What are the rules that you have to follow when you want to be a busker? Which songs can or shouldn't you play? This funny blog is your guideline, including a diary of an unfortunate busker. Consider this excerpt from a post called "Natural Enemies: The Busker's Nemeses":

Living statues earn money doing as little as possible. Wearing greenish outfits covered in (hopefully) fake pigeon shit, they are the vertical equivalent of a coma patient. People give them money just to watch them move. That would be like giving money to a busker to make him stop singing. Yes, even inanimate people get more attention than a busker and thus more money. It’s tempting to steal their income, but as immobile as they may seem, they will chase you even if it ruins their act.